Fujitsu AUXG07KVLA Manual page 197

2-20. E: 57. Damper (Open/Close) detection limit switch error
Indicator Indoor unit
Indoor unit main PCB
Limit switch
Detective actuator
Damper
Forecast of cause
Check point 1. Check limit switch
• Check operation of limit switch. (any blocking by dust, etc.)
• Remove limit switch and check ON/OFF switching operation by using a meter.
-> If limit switch is detective, replace it.
Check point 2. Check connector (CN18)/wire
Check loose contact of CN18/shorted wire (pinched wire).
-> Replace limit switch if the wire is abnormal
Check point 3. Check Damper
• Check the obstruction of damper movement.
• Check the damper movement.
-> Replace damper if the damper is abnormal
Check point 4. Replace the main PCB
If Check Point 1 and 3 do not improve the symptom, replace the main PCB.
2-20. E: 57. Damper (Open/Close) detection limit switch error
Operation indicator
Timer indicator
Economy indicator
Error code
• When limit switch were not able to detect the close
though the damper close.(Upper air flow)
• When limit switch were not able to detect the open
though the damper open.(Upper & Lower air flow)
↓
↓
↓
↓
End
- (03-33) -
5 time flash
7 time flash
Continuous flash
E: 57
Limit switch failure
Shorted connector/wire
Damper faulure
Controller PCB failure
2. Troubleshooting with error code